Every JPanel is a container, so either add it to a panel then add it to the container or directly use add(component) or use the getContentPane().add method. Both add the component to the container in Java 7 (I don’t know if version 6 has a problem with this or not).
On Windows, Java prevents starting the Installer twice by creating (two) lock files. If those files exist, Java Installer show the Message: “Another Java installation is in progress (…)”. If Java Installer crashes, or Windows crashes during Java Installation, the installer cannot delete the lock files when finalizing. Solution: Deleting the lock files, unlocks the … Read more
First of all, this is a compilation error. If you see the message it at runtime, you are probably running code that has compilation errors. Here are a couple of examples of the error: In both cases, the compiler error message will be error: ‘.class’ expected. What does the error message mean and what causes it? The … Read more
You can just copy the value of readln2 into a final variable: If you want to grab a new random line each time, you can either cache the lines of interest and select a random one in the event handler: Or you could just re-read the file in the event handler. The first technique is (much) faster but could … Read more
You can have an overflow when doing mathematic opetations between integers and chars, this can affect the expected result since that value is going to be assigned to a char… here you have but you should cast to char like:
The Java greater than or equal to operator is >=, not =>. Where you did: You should have done: If you ever have questions regarding this, check the Java Documentation first.
Ok it turns out I was doing something stupid. I hadn’t appended the new file name to the path. I had but it should have been Sorry it was a stupid mistake as always.
First of all, to understand the point of @Resource you need to understand the Inversion of Control (IoC). Inversion of Control is a principle in software development which goes that the control of objects should be transferred to a container or a framework. Dependency Injection (DI) is a pattern of IoC implementation, where the control being inverted is the setting … Read more
Eclipse debugging works with the class actually loaded by the program. The symptoms you describe sounds like the class in question was not found in the project, but in a distribution jar without debug info found before the project you are working with. This can happen for several reasons but have a look at the location where the classes … Read more
The AL lib is the “audio library” used by Libgdx (one of the OpenAL variants). I believe this message just means that the audio library is cleaning up some (in your case just one) audio streams/handles for you. If you see this at exit, its harmless as all resources will be cleaned up by the … Read more